Cross-welding machine



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' H G. R. GREEN.

GROSSYWELDING MAUHINB.

Patented June 3, 1890.

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G. R.GREEN. (moss WELDING MAGI/EINE. No. 429,568. Patented June 3, 1890.

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UNITED STATES TATENT OFFICE.

GEORGE ROSS GREEN, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO THE SPIRAL IVELD TUBE COMPANY, OF NEW' JERSEY.

CROSS-WELDING MACHINE.

SPECIFICATION forming part of Letters Patent N0. 429,568, dated June 3, 1890. Application filed March 4, I890- Serial No. 342,618. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE Ross GREEN,

a citizen of the United States, residing at ward the anvil.

East Orange, Essex county, New Jersey, have invented certain new and useful Improvements in Oross-WVelding Machines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The object of this invention is to cheapen the construction of a machine for welding the ends of thin sheet-metal skelps for the manufacture of spirally-seamed pipes, and also to facilitate the manipulation of the machine and the inspection of the partially-welded seam. To accomplish these objects, the anvil and the lower furnace are fixed in relation to the hammer and the upper furnace. The screw for feeding the carrieris provided with pulleys adapted to receive reversing-belts. The mechanism for sustaining and Vibrating the hammer is arranged wholly at one side of thehammerarm,andthevibrating levertoactuate the reversing-belts is projected from the opposite side of the bed. The lowerfurnace, as well as the anvil, has been made movable in such machines heretofore, and the hammer has been pivoted between stanchions, which interfered materially with the inspection of the partially-welded seam; but by my present construct-ion no mechanism is interposed between the operator and the hammer which operates upon the seam.

The invention will be understood by reference to the annexed drawings, in which Figure 1 is a side elevation of the machine. Fig. 2 is a plan of the same. Fig. 3 is a cross-section online a: w in Fig. 1, looking to- Fig. 4: is a cross-section on line y y in Fig. 1,looking toward the furnace. Fig. 5 is a cross section on line z zin Fig. 1, showing only the parts for vibrating the hammer-arm and feeding the carrier. Fig. 6 is a side View, and Fig. 7 an end view, of the pulley for vibrating the hammer.

A is a bed with flanged top, having seats B near its forward end to sustain the clamps C, for holding the ends of the skelp E in contiguity between the furnaces D D. The skelp is indicated by dotted lines.

'one direction than the other.

bed between the clamps O, and carries the lower furnace D and fulcrum gfor the upper furnace near the front end of the bed. It also carries the anvil H, adjacent to the lower furnace, and the hammer fulcrum-bearing J, adjacent to the rear end of the carrier. The upper furnace D is pivoted to the fulcrum 9 upon the forward side of the anvil by an arm 11, provided with a balance-weight (l and a slotted segment h and belt 2' are provided to hold the upper furnace elevated when adjusting the skelps, as shown in dotted lines in Fig. 1. The fulcrum-bearing J is arranged in the rear of the anvil wholly at one side of the arm I, which carries the hammer I. The hammer-arm is pivoted to the bearing with a stud J, and is provided at its. rear end by a crank-pin a. A crank-shaft fitted within a bearing 0 is provided with a crank-pin d, which is connected with the pin a by a link I), which is provided with compression-springs e, as is common, to produce an elastic stroke. A shaft G is fitted to a bearing H upon the rear end of the carrier at the same side as the fulcrum-bearing J, and is connected with the'shaft of the crank cl by bevel-gears A pulley k is provided with a hub is, fitted to a bearing 1 upon the rear end of the bed a, and the shaft G is fitted to turn therewith and slide longitudinally as the carrier is moved upon the bed. A screw 01. is fitted to a nut m upon the carrier and collared in a bearing 0 upon the bed,and the rear end of the screw is provided with two sets of fast and loose pulleys to rotate in opposite directions. The pulleys s s are made larger than the pulleys u. u, and the belts applied to the same are driven in opposite directions and at such speeds as to rotate the screw much faster in The pulleys u and s are fastened to the screw-shaft n, and two belt-guides p p are attached to a shipper-bar q, mounted in guides '1' over thepnlleys. A shifting-lever t is pivoted upon the bed upon the opposite side from the fulcrumbearing J and the pulley 7,11, and the operator, when standing adjacent to the shipper-bar to shift the belts, has an unobstructed view of the hammer and of the partially-welded skelp upon which it is operating.

The furnaces are supplied with gas and air under pressure through pipes "1: v, the movable furnace 1) being supplied through flexible hose, which are not shown, as they form no part of my present invention.

In using the machine to join the ends of two skelps the operator raises the upper furnace, as shown in dotted lines in Fig. 1, and adjusts the slcelps with their ends overlapped the desired amount upon the middle of the lower furnace. The upper furnace is then lowered, the blast turned on both to generate the heat, and when the edge of the skelp nearest the anvil is snfliciently heated for welding he moves the belt-guide p into the position shown in the drawings to throw the belt upon the fast pulley s to feed the carrier along, and thus move the anvil beneath the edge of the skelp. The hammer is then started by applying a tightener to a belt upon the pulley 7.1, as is common in such constructions, and the heating and welding of the skelp are continued until the carrier has moved the hammer all the way across the skelp, and the seam is completed. \Vhen the seam is completed, he moves the shifting-lever to throw the belt-guide 1) over the loose pulley s and the belt-guide 1) over the fast pulley a, which reverses the motion of the screw and runs the carrier back quickly to its initial position, (shown in Figs. 1 and 2,) and he then raises the movable furnace to remove the Welded skelps.

I leretofore it has been supposed. that a stationary anvil would chill the heated metal before it could be welded, and that the weldin g could only be eifected by vibrating a hammer or anvil to and from one side of the scam in opposition to a hammer vibrated upon the opposite side. I have discovered by repeated experiments that a stationary anvil may be used without any detrimental results, and I am thus enabled to dispense with all the mechanism for moving the anvil and lower furnace. I am thus enabled to fix the lower furnace directly upon-the carrier to make the anvil lower and to pivot all the movable parts lower upon the carrier, and therefore much closer to the bed-plate. The structure is thus not only cheaper, but has greater steadiness and durability.

The furnace is shown secured upon' the carrier between ribs .5 and secured by setscrews .9"; but it is immaterial how the furnace or anvil be fixed rigidly to the carrier to move with the same.

a Having thus set forth the nature of my invention, what I claim is 1. In a machine for cross-weldiu g skelps, the combination, with clamps for holding the skclps, of a movable carrier having an anvil ilxed rigidly thereon, and a hammer vibrated to and from the auvihas and for the purpose set forth.

2. In a machine for cross-welding skelps, the combination. with clamps for holding the skelps, of a movable carrier having an anvil fixed rigidly thereon, a lower furnace fixed upon the carrier adjacent to the anvil, an upper furnace supported movably over the fixed furnace, and a hammer vibrated to and from the anvil, as and for the purpose set forth.

3. A crosswclding machine comprising a bed having clamps at opposite sides to hold the skelps, a carrier fitted to slide upon the top of the bed between such clamps, a lower furnace fixed upon the carrier near one end of the same, a fulcrum near the end of the carrier, an upper furnace with an arm and balance-weight pivoted upon such fulcrum, a fulcrum-bearing fixed upon the carrier near its opgosite end, a hammer witharm having pivot projected at one side and fitted to such fulcrum-bearing, and means connected with the movable carrier for vibrating the hammer-arm, as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE ROSS (at-BEEN.

\Vitnesses:

II. P. GREEN, THOS. S. CRANE. 

